Yieldable feeding roll



H. .A. PERKINS YIELDABLE FEEDING ROLL Filed Feb. 20, 1925 5 Sheets-Sheet 1 (j/VVENTQR. 1 1 alm BY I n 4w, ATTORNEY Oct. 19,1925. 1,503,555

H. A. PERKINS Filed Feb. 20, 1925 3 Sheets-Sheet 2 NVENTOR.

BYI m '1 ATORNEY r Oct. 19 1926. 1,603,555

H. A. PERKINS YI ELDABLE' FEEDING ROLL Filed Feb 20 1925 3 Sheets-Sheet 5 IN VEN TOR.

a. ATTQRNEY Patented (Jet. 19, 1926,

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HIRAM A. PERKINS, OF ROCHESTER, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS,

TO YATES-AMERICAN MACHINE COMPANY, OF ROCHESTER, NEW YORK, A (30320- NATION OF DELAWARE.

YIELDABLE FEEDING ROLL,

Application filed. February 20, 1925. Serial No. 10,645.

- My invention relates to a yieldable feeding roll such as is employed in feeding lumber in woodworking machinery, and it has for its purpose to provide a practical and eflicient arrangement for permitting the required yielding between the relative movable parts of the roll.

More particularly, the invention is intended to provide for supporting the parts and so mounting the springs that the necessary yieldable act-ion can take place Without distorting or twisting the springs, thus contributing to the longer life'of the roll.

In a specific aspect, the invention has for a further object to provide the relatively movable members with opposite surfaces that are preferably parallel when the parts are-in normal position, forming a right angle with the longitudinal axis of a coil spring positioned therebetween, and afford ing a connection between said surfaces and the spring which permits the longitudinal axis of the spring to change its angular relation to said opposite surfaces without distorting or damaging the spring.

To these and other ends, the invention comprises the details and combinations of parts that will appear clearly from the following description when read in conjunction with the accompanying drawings, the novel features being pointed out in the claims at the end of the description.

In the drawings:

Figure 1 is a side elevation of one section of a feeding roll constructed in accordance with-a preferred embodiment of my invention, and illustrating the parts in their normal positions when no pressure is upon the roll;

Figure 2is a similar view partially in section, showing the position of the parts when relative movement has taken place, due to pressure upon the feeding roll when feeding a piece of stock;

Figure 3 is a side elevation partially broken away and in section, showing one of the springs and the form of connection beone end of the spring and its mounting,'the

normal position of the spring appearingin full lines and the dotted lines showing the position of the spring when pressure is applied to the feeding roll;

Figure 5 is a detail side view of part of the outer member of the feeding roll with a mdially projecting portion, the socket which slsupports the spring being shown in dotted mes;

Figure 6 is a front elevation of the part shown in Figure 5;

Figure 7 is a side view of the connecting member that serves to mount the spring, and

Figure 8 is an end view of the same.

In woodworking machinery, feeding rolls are used by which stock of varying thicknesses can be fed. Such rolls usually include a series of sections mounted sideby side on a common supporting spindle, and to illustrate my invention, I have shown only one of such sections, since the several sections or units which go to make up the roll are alike.

In the structure shown, 1 and 2 designate the outer and inner members respectively of a feeding roll, the inner member being fixedly mounted on a rotating supporting spindle 3, and the outer member 1 being mounted for relatively yielding movement upon the inner member 2. The inner and outer members are held in their normal relationship by coil springs which yieldably resist relative move ment between the members caused by pressure upon the roll, and return the outer memher to normal relationship when such pressure is removed. It is a purpose of my 1mprovement to so mount the springs that they will function properly between the inner and outer members, and at the same time permit the necessary relative movement of the members without beingdistorted, twisted or strained. I

To accomplish this, I provide the outer member with radially projecting portions 5 and the inner member with radially project ing portions 6. Said radially projecting portions include adjacent surfaces 7 and 8 respectively which abut one another and are parallel when the parts are in normal position, as shown in Figure 1. Said radially projecting portions also include surfaces 9 and 10 respectively, at angles to the surfaces 7 and 8, and disposed so that when the parts are in normal position, two opposite sur faces 9 and 10 between which a sprin 15 is positioned will be substantially para lel to one another. Each spring is arranged be tween a pair of such surfaces 9 and 10, in such manner that its lon itudinal airis as-' sumes a position at right angles to the surfaces 9 and 10. It is essential when the surfaces 9 and 10 change their parallel relationship, as shown in Figure 2', due to the pressure of a piece of stock going under the roll, that there be such a connection with the spring as to permit its assuming a osition with its longitudinal axis at other than a right angle to the surfaces 9 and 10 without twisting or distorting the spring, and this is accomplished in the following manner. Y

The spring is provided at each end with a connecting member having a cylindrical body portion 11 that fits within the spring and a flange 12 that supports the connecting member upon the end of the spring, while 13 is a rounded or ball-shaped portion that engages a similarly rounded opening or socket 14 in the surface of the adjacent radially projectingportion. The socket is is preferably slightly larger than the rounded portion 13, as shown in Figures 3 and 4, thus readily permitting bodily movement of the spring and connecting members from the position shown in full lines in Figure fl to the position shown in dotted lines. This change of position of the spring and its connectin members is illustrated by the transition from Figure 1, where the longitudinal axis of the spring is at right angles to the opposite parallel supporting surfaces, to that illustrated in Figure 2, in which the opposite surfaces have been moved relatively out of parallel relationship and the spring tilted bodily. The moment that pressure on the roll is released, the springs 15 act to return the outer member 1 to normal position with reference to inner member 2, shown in Figure 1, the springs resuming their right ai'igula-r relationship tothe opposite supporting surfa es 9 and 10 which arejthgn parallel.

It will b'e obvious thatjthe radially rojeeting portions, the connecting me'ans' et'ween them, and the pringsma be changed in va ious respects without departing substan- 'tially from the underlying purposes and features ofthe invention, and this application is intended to sever any 'rnodifications that may come within the fundamental characteristics of my improvements or the scope of the following claims.

I claim:

1. A yieldable feeding roll comprising an inner member and a cylindrical outer membcr yieldably mounted: on the inner member, said members including radially projecting portions, and a series of coil springs, each of which is supported between a pair. of projecting': portions on the inner and outer members respectively and has a universal connection therewith.

2. A yield'able feeding roll comprising an inner member and a cylindrical outer member yield'ably inoimted on the inner member, said members including radially projecting portions, and a series of coil springs, each of which has a ball and socket connection with a pair of projecting portions on the inner and outer members respectively;

3. A yieldab'le feeding roll comprising an inner member and a cylindrical outer member yieldably mounted on the inner member, said members including radially projecting portions having opposite surfaces spaced from each other and paigillel' when the members are in normal position, coil springs arranged between said opposite surfaces, the longitudinal axis of each spring being in right angular relation to the surfaces which support it when the members are in normal position, and universal joints connecting the springs to said opposite parallel surfaces.

4. A yieldable feeding roll comprising an inner member and a cylinder outer member yieldably mounted on the inner member, said members including radially projecting portions having opposite surfaces spaced from each other and parallel when the members are in normal position, coil s rings arranged between said opposite 'sur aces, the longitudinal axis of each spring being in right angular relation to the surfaces which sup port it when the members are in normal position, and ball and socket connections between the ends of the spring and the surfaces which support it.

5. A yieldable feeding roll comprising an inner member and a cylindrical outer member yicldably mounted on the inner member, said members including radially projecting portions 9 having opposite surfaces spaced from each other and parallel when the members are in normal position, coil springs arranged between said opposite surfaces, the longitudinal aXis of each spring being in right angular relation to the surfaces which support it when the members are in normal osition, said o posite surfaces having curved sockets therein, and connecting members carried by the ends of the springs 11 1g curved projections fitting in said Ebcif ts.

6. A yieldable feeding roll comprising an inner member and a cylindrical outer member yieldably mounted thereon, said members having radially projecting portions including opposite surfaces which are spaced from one another, coil springs supported between said opposite surfaces, the longitudinal axes of said springs being normally at right angles to their supporting surfaces and movable to positions other than right angles 1 upon relative movement of said members, and means whereby the angular relation between the longitudinal axis of each spring and its supporting surfaces may be changed without distorting the spring.

In witness whereof, I have hereunto signed my name.

HIRAM A. PERKINS. 

